prep for 1.16.0 release (#60)

* prep for 1.16.0 release

Co-authored-by: rodric rabbah <rodric@gmail.com>

Author: dgrove-oss

NOTICE.txt

@@ -1,5 +1,5 @@
 Apache OpenWhisk Runtime Ruby
-Copyright 2016-2020 The Apache Software Foundation
+Copyright 2016-2021 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).

core/ruby2.5Action/CHANGELOG.md

@@ -19,7 +19,8 @@
 
 # Ruby 2.5 OpenWhisk Runtime Container
 
-## Next Release
+## 1.16.0
+  - Use 1.17.0 release of openwhisk-runtime-go (#52)
   - Install the latest security fixes with every image build.
 
 ## 1.15.0

core/ruby2.6ActionLoop/CHANGELOG.txt

@@ -19,7 +19,8 @@
 
 # Ruby 2.6 OpenWhisk Runtime Container
 
-## Next Release
+## 1.16.0
+  - Use 1.17.0 release of openwhisk-runtime-go (#52)
   - Install latest security fixes with every image build.
 
 ## 1.15.0